Lyne,
well if your PC is good enough, ie VERY recent/good motherboard, going to vista ultimate with more RAM maybe an idea. (don't know yer specs)
new system works great with Vista ultimate 64 bit, just have to work on it to get through the bugs :D

http://vistabits.info/turn_off_DEP.htm
http://vistabits.info/turn_off_UAC.htm
that should help a LOT :)

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